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1) Tap water contains dissolved oxygen gas, O2(aq). Adding heat to tap water causes the dissolved oxygen to leave. Which of the two equations below represents a chemical reaction, and which does not? Defend your answer.
(a) 2 H2O2(l) →2 H2O(l) + O2(g)
(b) H2O(l) + O2(aq)
Heat
H2O(l) + O2(g)
2) Which of the following are redox reactions?
(a) 2 Na + 2 H2O →2 NaOH+ H2
(b) MgBr2 + 2 NaF→MgF2 + 2 NaBr
(c) 2 CO + O2 →2 CO2
(d) SO2 + H2O →H2SO3
For HCB, log Kow = 6.6. What would be the predicted concentration (ppm) of HCB due to bio-concentration in the fat of fish that swim in waters containing 0.000010 ppm of the chemical?
Explain Why In cycloalkanes, ring strain decreases with the increased number of carbons, yet the most abundant rings in nature are five and six membered rings.
What velocity would an electron 9.11*10^-31 kg need for its de Broglie wavelength to be that of red light 745nm ?
Determine the [H3O+], [OH-], pH, and pOH for each of the following solutions. A solution of 1.65 x 10-4 M HCl
Hydrogenation reactions are used to add hydrogen across double bonds in hydrocarbons and other organic compounds. Use average bond energies to calculate DELTA Hrxn for the following hydrogenation reaction
Oxygen gas can be obtained by the thermal decomposition of mercuric oxide; 2 HgO(s) + heat ® 2 Hg(l) + O2(g) What volume in liters of oxygen gas, measured at 6.926 °C and 0.9130 atm, would be produced from 12.43 g of HgO
Combining aqueous solutions of BaI2 and Na2SO4 gives a precipitate. Which ion(s) is/are spectator ions in the reaction
If it takes 526 J of energy to warm 7.40 grams of water by 17 degrees Celsius, how much energy would be needed to warm 7.40 grams of water by 55 degrees Celsius?
Explain for which of the following species is resonance an important property: HONO, HONO2, N3-, NO2-, NO2
A 670 mL gas sample at STP is compressed to a volume of 284 mL, and the temperature is increased to 20C. What is the new pressure of the gas in Pa? Answer in units of Pa.
Carbon dioxide dissolves in water to form carbonic acid. Estimate the thermodynamic equilibrium constanst (K) for this reaction (delta Gf values: H2CO3= - 616.1, H2O= - 237.1, CO2= - 394.4) .
why is the Lineweaver Burke plot superior to the Michaelis- Menton plot for calculation enzyme kinetic values
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